Automatic locking device for sash-windows.



Patented. Mar. 21, i911.

Inv e n to 1:

G'ARL AUGUST HALBACH,

OF RONSIDORF, GERMANY.

AUTOMATIC LOCKING DEVICE FOR SASH-WINDOVKTS.

To all whom it may concern:

Beit known that 1, CARL AUGUST H L- naou, a subject of the King ofPrussia, German Emperor, resident of Ronsdorf, Germany, have inventedcertain new and useful Improvements in Automatic Locking Devices forSashindows, of which the following is a specification.

This invention relates to a sash-window which is constructed so that itcan be stopped at any height by means of toothed wheels meshing withracks, which are mounted in the frame. ;The window according to thisinvention does not require special manipulations, the toothed wheelsbeing guided in grooves of the frame so that when the window is beinglet down, said toothed wheelsbrake the window and stop it by strikingagainst a pawl on.the window. I

.In. the accompanying drawing the im proved window for railwaycompartments is shown by way of example.

Figure 1 is a cross section showing one side frame of the window at theplace where the toothed wheel is situated. Fig. 2 represents in frontelevation the upper left hand side corner of the window and of thewindow frame partly in section.

The improved window for railway compartments is constructed as follows:-At either side of the window aguide bar a is provided to which therack Z) is fixed. The toothed wheel 0 located in the window frame mesheswith said rack b. The toothed wheel 0 has an axle which is mounted withits endsin vertical slots f of the casing d fixed in the window frame.Said axle therefore canrevolve and simultaneously move Specification ofLetters Patent. Application filed J'une' a, 1910. Serial No 568,348.

Patented Mar. 21, 1911.

l in vertical direction. The stop pin e is fixed in the casing d abovethe toothed wheel a.

The device operates as follows :When the window is being lifted thetoothed Wheel lies upon the bottom of the casing, its axle beingsupported by the ends'of the vertical slots f. Said toothed wheelrevolves with the window has been raised it is released so that it wheel15 braked by to. the desired height drops. The toothed the rack andc0nse until the stop two teeth of said wheel, locks .the same in itsposition, the window being locked also. In certain cases it would besufiicient'to mount the device at one side of the window only.

CARL AUGUST HALBAGH.

Witnesses:

CHAs. J. W RIGHT,- OTTo KoNIo.

window when the same is being lifted;-if the An improved device forstopping and.

quently its axle moves upward in the slots 1 pin e penetrating between

